#!/usr/bin/env gnuplot


set key
set grid
 

set title "fft"
set xlabel "f"
set ylabel "幅值"
plot \
    "d1.txt" using 1:2 w l title "FFT"


#quit 
#pause 5 #等待4s
#refresh #刷新，重新绘制
#reread #读取数据显示
pause 60
exit
